SBIR-STTR Award

In this program, we will develop a concept for microsecond tuning notches meeting the notch depth and insertion loss requirements of the application. We will define a full set of target specifications for the tunable notches that meet a current or future operational need. We will demonstrate through simulation that this technology can be used for microsecond tunable narrowband notch filters with minimal insertion loss. We will then design and optimize a resonator to minimize the size, maximize the Q (hence minimizing passband loss) and the tuning range, and optimize the precision in Phase II. We will then outline the technical risks for Phase II. Successful completion of this effort will form a solid foundation for building and testing a prototype tunable filter in Phase II.

Benefit:
Such filters should have applicability in digital transmitters at the point where digital to analog signal conversion happens, assuming they have sufficient power handling characteristics to be low loss. They may also have applicability in commercial comms systems where spectral density is high so that active suppression of adjacent channels is critical to a given channel's utility.

Keywords:
analog filters, analog filters, high Q filters, equal phase filters, rapid tuning, filters

In this program, we will develop a concept for microsecond tuning 3 MHz BW HTS bandpass filters meeting the sharp rejection and insertion loss requirements of the application. We will define a full set of target specifications for the tunable bandpass filters that meet a current or future operational need. We will perform at least two design/fabricate/test cycles. At the end of the first year, we will perform a laboratory demonstration of the tunable bandpass filter. In the second year, we will focus on improved the power handling capability of the tunable filter. At the end of the second year, we will perform a laboratory demonstration of a filter meeting all of the specifications of the application. In the Phase II option, we will build a laboratory prototype to demonstrate the advantages of this technology. Successful completion of this effort will form a solid foundation for building and testing a fieldable prototype in Phase III.

Benefit:
Such filters should have applicability in digital transmitters at the point where digital to analog signal conversion happens, assuming they have sufficient power handling characteristics to be low loss. They may also have applicability in commercial comms systems where spectral density is high so that active suppression of adjacent channels is critical to a given channel''s utility.

Keywords:
rapid tuning, Tunable Filters, high Q filters, equal phase filters, analog filters